Synchronization signal transmission techniques

Abstract

Systems and methods for synchronizing communications between a User Equipment (UE) and Base Station (BS) using a synchronization signal structure. The synchronization signal structure can include a sequence of Synchronization Signals (SS) 5 including repetitions of a synchronization signal burst set. The synchronization signal burst set can include a plurality of synchronization signal bursts. The synchronization signal bursts can include a plurality of synchronization signal blocks, wherein the synchronization signal blocks can include a plurality of Synchronization Signals (SS).

What is claimed is: 
     
       1. An apparatus of a user equipment (UE) operable to synchronize with a New Radio (NR) cell, the apparatus comprising:
 one or more processors configured to: 
 search a plurality of frequency ranges to detect a synchronization signal/physical broadcast channel (SS/PBCH) block, wherein to detect the SS comprises to cross-correlate synchronization signal blocks within a synchronization signal burst set; 
 decode, at the UE, the SS/PBCH block that includes a PBCH, a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) in consecutive symbols; and 
 perform, at the UE, a synchronization with the NR cell based in part on the SS/PBCH block, wherein the synchronization includes a time and frequency synchronization between the UE and the NR cell; and 
 a memory interface configured to send to a memory the SS/PBCH block. 
 
     
     
       2. The apparatus of  claim 1 , further comprising a transceiver configured to receive the SS/PBCH block at the UE. 
     
     
       3. The apparatus of  claim 1 , wherein the SS/PBCH block is in accordance with a 15 kilohertz (kHz) subcarrier spacing. 
     
     
       4. The apparatus of  claim 1 , wherein the one or more processors are configured to decode the SS/PBCH block received at the UE in accordance with a defined periodicity. 
     
     
       5. The apparatus of  claim 4 , wherein the defined periodicity is a half frame. 
     
     
       6. An apparatus of a user equipment (UE) of a millimeter wave new radio system operable to synchronize communication with a base station (BS), the apparatus comprising:
 a memory interface configured to access synchronization parameters in a memory; and 
 one or more processors configured to: 
 search a plurality of frequency ranges to detect synchronization signals (SS), wherein to detect the SS comprises to cross-correlate synchronization signal blocks within a synchronization signal burst set; 
 decode, for a plurality of beams, a sequence of SS according to one or more accessed synchronization parameters, the sequence of SS including: 
 repetitions of the synchronization signal burst set, the synchronization signal burst set including: 
 a plurality of synchronization signal bursts, the synchronization signal bursts including: 
 a plurality of synchronization signal blocks, the synchronization signal blocks including: 
 a plurality of SS; and 
 synchronize with a given BS based on the decoded SS. 
 
     
     
       7. The apparatus of  claim 6 , further comprising a transceiver configured to receive the sequence of SS. 
     
     
       8. The apparatus of  claim 6 , wherein the synchronization parameters include the periodicity of the synchronization signal burst set. 
     
     
       9. The apparatus of  claim 6 , wherein the synchronization parameters include the duration of the synchronization signal burst set. 
     
     
       10. The apparatus of  claim 6 , wherein a synchronization signal block with a particular synchronization signal block index has a particular periodicity. 
     
     
       11. The apparatus of  claim 6 , wherein synchronization signal blocks with different synchronization signal block index numbers represent SS transmitted in different time instances over a half radio frame period. 
     
     
       12. The apparatus of  claim 6 , wherein synchronization signal blocks are consecutive within a synchronization signal burst. 
     
     
       13. At least one non-transitory machine readable storage medium having instructions embodied thereon for synchronizing communication between a user equipment (UE) and a base station (BS), the instructions when executed by one or more processors at the UE perform the following:
 searching a plurality of frequency ranges to detect synchronization signals (SS) wherein detection of the SS includes cross-correlating synchronization signal blocks within a synchronization signal burst set; 
 decoding, for a plurality of beams, a sequence of SS according to one or more accessed synchronization parameters, the sequence of SS including: 
 repetitions of the synchronization signal burst set, the synchronization signal burst set including: 
 a plurality of synchronization signal bursts, the synchronization signal bursts including: 
 a plurality of synchronization signal blocks, the synchronization signal blocks including: 
 a plurality of SS; and 
 synchronizing with a given BS based on the decoded SS. 
 
     
     
       14. The at least one non-transitory machine readable storage medium of  claim 13 , wherein the synchronization parameters include the periodicity of the synchronization signal burst set. 
     
     
       15. The at least one non-transitory machine readable storage medium of  claim 13 , wherein the synchronization parameters include the duration of the synchronization signal burst set. 
     
     
       16. The at least one non-transitory machine readable storage medium of  claim 13 , wherein a synchronization signal block with a particular synchronization signal block index has a particular periodicity. 
     
     
       17. The at least one non-transitory machine readable storage medium of  claim 13 , wherein synchronization signal blocks with different synchronization signal block index numbers represent SS transmitted in different time instances over a half radio frame period. 
     
     
       18. The at least one non-transitory machine readable storage medium of  claim 13 , wherein synchronization signal blocks are consecutive within a synchronization signal burst.